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What problem are you having? Alan

________________________________
From: [email protected] <[email protected]> on behalf of Greg Ashley <Gregory@...>
Sent: Monday, July 8, 2019 3:03 PM
To: [email protected]
Subject: Re: [nanovna-users] Your NanoVNA version

Can some one please help me to get the computer software to run my NanoVNA ?

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of f4htq via Groups.Io
Sent: 08 July 2019 16:02
To: [email protected]
Subject: Re: [nanovna-users] Your NanoVNA version

Dear Hugen,
I own the two versions ( your designed version, black, with battery and shielded entries, and the "clone" white version ).
I noticed that the mixers used in white version are SA602A instead of SA612A. Do you think that will be a issue ? have you put SA612A mixers on your model ?
I have a huge performance differencies betwen the black and the white version. at 900MHz little more than 50 dB of dynamic range subsist with the black version but no more than 30dB with the white version.
Do you think that can be only explained by the missing shielding ?
(However when i made some test on HF and VHF frequencies, the results seems quite identicals).
regards,
David, F4HTQ.

Can some one please help me to get the computer software to run my NanoVNA ?

Dear Hugen,
I own the two versions ( your designed version, black, with battery and shielded entries, and the "clone" white version ).
I noticed that the mixers used in white version are SA602A instead of SA612A. Do you think that will be a issue ? have you put SA612A mixers on your model ?
I have a huge performance differencies betwen the black and the white version. at 900MHz little more than 50 dB of dynamic range subsist with the black version but no more than 30dB with the white version.
Do you think that can be only explained by the missing shielding ?
(However when i made some test on HF and VHF frequencies, the results seems quite identicals).
regards,
David, F4HTQ.

On Mon, Jul 8, 2019 at 10:44 AM, amirb wrote:

Hugen,

Are there any other differences with your design, other than the RF shields,
that I should be looking out for?
He hasn't shipped it yet. He talks about the shields in the description, so as
soon as I get it,
if it doesn't match the description I will file a dispute but I would like to
know if there are other things that I should be aware of?

thanks



On Sun, Jul 7, 2019 at 08:51 PM, <hugen@...> wrote:

On Fri, Jul 5, 2019 at 08:47 PM, amirb wrote:

is there anyway to know if this one is a bad clone ? This is what I have
placed an order for but not shipped yet. I can still cancel it. Thanks !

I'm not sure, either, because the clone maker will steal my test pictures
directly. Checking the internal construction is an effective method.

On Sun, Jul 7, 2019 at 08:51 PM, <hugen@...> wrote:

shipped

The shield should cover the bridge and mixer completely，like the picture shown by Ernst. A precise set of calibrations is provided and nanoVNA has been calibrated.

Thank you！

hugen

Hugen,

Are there any other differences with your design, other than the RF shields, that I should be looking out for?
He hasn't shipped it yet. He talks about the shields in the description, so as soon as I get it,
if it doesn't match the description I will file a dispute but I would like to know if there are other things that I should be aware of?

thanks



On Sun, Jul 7, 2019 at 08:51 PM, <hugen@...> wrote:

On Fri, Jul 5, 2019 at 08:47 PM, amirb wrote:

is there anyway to know if this one is a bad clone ? This is what I have
placed an order for but not shipped yet. I can still cancel it. Thanks !

I'm not sure, either, because the clone maker will steal my test pictures
directly. Checking the internal construction is an effective method.

On Sun, Jul 7, 2019 at 08:51 PM, <hugen@...> wrote:

shipped

Okay, but isn't that what GitHub is for?
These days with all the fancy dissassemblers available, it's very easy to reverse engineer most code anyways and it is an unfortunate fact that everything of value is copied at some point.
So, without going into great detail, are you able to say what differences are between the original NanoVNA F/W and your version? (Fixes and/or changes).

Thanks
Larry

I'm sorry Larry.
Under the GNU protocol, I should open my code, but there are clone makers who use my firmware and claim to have modified the code themselves, and I delayed the plan to open the code in order to avoid worse.

hugen

On Fri, Jul 5, 2019 at 08:47 PM, amirb wrote:

is there anyway to know if this one is a bad clone ? This is what I have
placed an order for but not shipped yet. I can still cancel it. Thanks !

I'm not sure, either, because the clone maker will steal my test pictures directly. Checking the internal construction is an effective method.

On Sat, Jul 6, 2019 at 04:48 AM, dk1vi wrote:

hugen,
from outside your device looks same as the "worse clone". So only a look
inside will tell if you got a good one.
So I enclosed a picture of my device, hoping it is a good clone.
Ernst

It looks good.

On Sat, Jul 6, 2019 at 09:15 PM, larry@... wrote:

What do you mean by reset cal data.

Do you mean turn cal correction off before trying to collect new cal data.

What key strocks are you talking about.

Do you believe the unit is using modified readings instead of raw data to
calculate correction array

larry

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of
hugen@...
Sent: Friday, July 5, 2019 8:52 PM
To: [email protected]
Subject: Re: [nanovna-users] Strange peaks in S11 with load

It is necessary to reset the calibration data before carrying out the
calibration.

That must be a later version design

I have a black nanoVNA and it does have a USB-C connector.

It is a micro USB connector.

I am not sure if people have confused micro USB with USB-C on this list, or
if there really are some nanoVNA which have USB-C connectors.

My model is the white gecko, but I have ordered a black one from Hugens
taobao store.

Cheers,
Roger


On Sun, 7 Jul 2019 at 21:36, Henning Weddig via Groups.Io <hweddig=
[email protected]> wrote:

Which type of USB connector mtes to the usb port of the nano vna (White
Version)?
i tried the USB C connector, but it does not match.
Furterhmore: how is the internal battery charged: USB cable connected, but
powre swithc off?bad battery or
At least: on Arrival the unit worked, but after three weeks of non use the
battery seems to be discharged although the power switch is off. Very
strange. Is mine a bad battery or is tehre some quiescent cutrrent even
unde r the off postion
Regards
Henning Weddig

Which type of USB connector mtes to the usb port of the nano vna (White Version)?
i tried the USB C connector, but it does not match.
Furterhmore: how is the internal battery charged: USB cable connected, but powre swithc off?bad battery or
At least: on Arrival the unit worked, but after three weeks of non use the battery seems to be discharged although the power switch is off. Very strange. Is mine a bad battery or is tehre some quiescent cutrrent even unde r the off postion
Regards
Henning Weddig

On Sat, Jul 6, 2019 at 03:07 PM, alan victor wrote:

Here is a 1 dB SMA pad terminated in a short. The cal was done at the end of a
SMA connector saver. The 1 dB pad connected to the saver and the pad shorted
with their short SMA cal. The Gamma should be 0.87, the marker read out is ~
0.83-to-0.85 for the most part till 900 MHz where the Gamma drops to ~ 0.8.

Here is a 1 dB SMA pad terminated in a short. The cal was done at the end of a SMA connector saver. The 1 dB pad connected to the saver and the pad shorted with their short SMA cal. The Gamma should be 0.87, the marker read out is ~ 0.83-to-0.85 for the most part till 900 MHz where the Gamma drops to ~ 0.8.

Alan

________________________________
From: [email protected] <[email protected]> on behalf of alan victor <avictor73@...>
Sent: Saturday, July 6, 2019 9:34 PM
To: [email protected]
Subject: Re: [nanovna-users] Messaging (over USB-C) between nanovna and PC client - documented (or could be)?

Ernst,

I have done something similar. I will see if I can gather up the worse case that I have considered. A calibrated 1 dB SMA pad terminated in a short. Hence, a 2 dB return loss, a reflection coefficient of ~ 0.8

________________________________
From: [email protected] <[email protected]> on behalf of dk1vi <dk1vi@...>
Sent: Saturday, July 6, 2019 8:35 PM
To: [email protected]
Subject: Re: [nanovna-users] Messaging (over USB-C) between nanovna and PC client - documented (or could be)?

I have commercial mismatches specified up to 4GHz with N-cnnectors (m). After calibration with the supplied SMA calset I mesured the mismatches connected via an SMA (m) to N(f) adapter.
The result was very convincing, see enclosed plot.
Ernst

Ernst,

I have done something similar. I will see if I can gather up the worse case that I have considered. A calibrated 1 dB SMA pad terminated in a short. Hence, a 2 dB return loss, a reflection coefficient of ~ 0.8

________________________________
From: [email protected] <[email protected]> on behalf of dk1vi <dk1vi@...>
Sent: Saturday, July 6, 2019 8:35 PM
To: [email protected]
Subject: Re: [nanovna-users] Messaging (over USB-C) between nanovna and PC client - documented (or could be)?

I have commercial mismatches specified up to 4GHz with N-cnnectors (m). After calibration with the supplied SMA calset I mesured the mismatches connected via an SMA (m) to N(f) adapter.
The result was very convincing, see enclosed plot.
Ernst

I have commercial mismatches specified up to 4GHz with N-cnnectors (m). After calibration with the supplied SMA calset I mesured the mismatches connected via an SMA (m) to N(f) adapter.
The result was very convincing, see enclosed plot.
Ernst

Hi Tim

My main purpose in experimenting with the NanoVNA was to see if it could make a good impedance analyzer.

Unfortunately, results so far indicate that it does not perform well in this respect. As you probably know, a VNA can be used to measure impedance using the reflecting bridge to measure S11. Comparing results from the Nano to a professional impedance analyzer with the same SOL calibration shows substantial differences.

It did perform well measuring small inductors (1 uH ) from 50 KHz to 1 MHz. Above that frequency errors increased substantially.

There are several possible reasons for the disappointing results. We can discuss this more if you are interested.

But, because of this performance I cannot, in good conscience, release a program that misleads users by producing inferior results. If you or someone else pursues this path, please make sure you have a good impedance analyzer and some good reference components for comparison.

Regards,

George

Hi Larry,

I also did not understand Hugen comment.

However, this is a guess based on what I see when the PC SW connects and pulls measured data from the nanoVNA instrument.

This only occurs when you request the SW to read that measured data. After extracting correct measured data, it appears that the PC SW alters the cal state of the nanoVNA. A reset which is a soft touch screen icon on the nanoVNA may put back the prior corrected cal state. Or if you were to do a cal from the PC SW, there is an icon for that on the PC SW screen, the same reset on the touch screen is required.

I have used the PC SW to capture real time tuning of a matching network. The PC will track the nanoVNA point for point, say a log mag plot of S11 or a S11 Smith plot and this occurs very rapid and with no errors. So the SW does several functions very well with no hiccups. But it is not perfect. And glitches between the SW and HW do occur.

Alan

________________________________
From: [email protected] <[email protected]> on behalf of larry@... <larry@...>
Sent: Saturday, July 6, 2019 1:15 PM
To: [email protected]
Subject: Re: [nanovna-users] Strange peaks in S11 with load

What do you mean by reset cal data.

Do you mean turn cal correction off before trying to collect new cal data.

What key strocks are you talking about.

Do you believe the unit is using modified readings instead of raw data to calculate correction array

larry

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of hugen@...
Sent: Friday, July 5, 2019 8:52 PM
To: [email protected]
Subject: Re: [nanovna-users] Strange peaks in S11 with load

It is necessary to reset the calibration data before carrying out the calibration.